Comment 5 for bug 1423279

Also affect some other package upgrade:

Unpacking update-manager-core (1:15.04.2) over (1:15.04.1) ...
Preparing to unpack .../update-manager_1%3a15.04.2_all.deb ...
Unpacking update-manager (1:15.04.2) over (1:15.04.1) ...
Processing triggers for gnome-menus (3.10.1-0ubuntu5) ...
Processing triggers for mime-support (3.58ubuntu1) ...
Processing triggers for desktop-file-utils (0.22-1ubuntu3) ...
Processing triggers for man-db (2.7.0.2-5) ...
Processing triggers for gconf2 (3.2.6-3ubuntu1) ...
Processing triggers for libglib2.0-0:i386 (2.43.4-1) ...
Setting up python3-distupgrade (1:15.04.6) ...
  File "/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeViewKDE.py", line 337
    self.confDialogue.show_difference_button.clicked.connect(self.showConffile))
                                                                               ^
SyntaxError: invalid syntax